Physicist Patricia Burchat sheds light on two basic ingredients of our universe: dark matter and dark energy. Comprising 96% of the universe between them, they can't be directly measured, but their influence is immense.

We believe that the easiest way to change people's behaviour for the better is by making it fun to do. We call it The Fun Theory. Watch as these experimenters make people WANT to take the stairs over an escalator.

This video shows you how to build a handleable fireball composed of cotton fabric, cotton thread and lighter fluid. Though a relatively simple experiment, we strongly advise against trying this at home.